There's no crying in baseball!

From Wiki Gonzalez

"There's no crying in baseball!" is a phrase uttered by Tom Hanks' character in A League of their Own, a film about the professional women's baseball league that sprung up in the U.S. Midwest during World War II. This had the to-be-expected effect of causing the crying woman to cry harder.

Though not necessarily limited to Primer, the phrase is often used as a backhanded way of accusing someone -- be they a fellow poster or an inept columnist -- of whining. Essentially it means, "Shut up already!"

The scene from which it was taken was hilaripusly reenacted by Harold Reynolds (in the Tom Hanks role) and Peter Gammons (as the crying woman) in a series of commercials for Baseball Tonight.